Method of and apparatus for providing an interface between an analog facsimile device and a wireless network
First Claim
1. A method for receiving and transmitting a document image in an interface device, comprising the steps of:
- determining that a fax machine has transmitted a signal indicating that it has gone "off hook";
transmitting a tone to the fax machine, which tone emulates a dial tone;
receiving DTMF tones from the fax machine temporarily storing these dialed digits, which DTMF tones include calling information;
transmitting a called station ID to the fax machine;
receiving a station ID;
receiving a digital command signal from the fax machine;
receiving a training sequence signal from the fax machine;
transmitting a first confirmation signal to the fax machine;
receiving dialed digits;
temporarily storing the dialed digits;
receiving fax data in the form of a document image;
receiving a signal indicative that all fax data has been transmitted by the fax machine;
transmitting to the fax machine a second confirmation signal;
receiving a disconnect signal;
receiving an "on-hook" signal;
transmitting a dial string message including the temporarily stored dialed digits in an origination message to a wireless transceiver requesting Fax Class 2.0;
transmitting an "AT+FDT" signal to the wireless transceiver;
receiving a signal indicative of a line connection;
transmitting the stored document image;
transmitting a return to command signal (RTC); and
transmitting an EOP signal wherein the wireless transceiver terminates its wireless communication link.
3 Assignments
0 Petitions
Accused Products
Abstract
An interface device for faxing documents over a wireless network includes circuitry for emulating the public switched telephone network (PSTN) for communicating with an analog fax machine. The circuitry receives and stores a document image from the fax machine. It then prompts a wireless transceiver to establish a call connection. Once a call connection is created to a destination fax through the wireless network the interface device transmits the stored document image. The inventive method includes the steps of communicating with a fax over by means of one protocol to receive a document image, storing the document image, and transmitting the document image by means of a second protocol.
46 Citations
9 Claims
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1. A method for receiving and transmitting a document image in an interface device, comprising the steps of:
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determining that a fax machine has transmitted a signal indicating that it has gone "off hook"; transmitting a tone to the fax machine, which tone emulates a dial tone; receiving DTMF tones from the fax machine temporarily storing these dialed digits, which DTMF tones include calling information; transmitting a called station ID to the fax machine; receiving a station ID; receiving a digital command signal from the fax machine; receiving a training sequence signal from the fax machine; transmitting a first confirmation signal to the fax machine; receiving dialed digits; temporarily storing the dialed digits; receiving fax data in the form of a document image; receiving a signal indicative that all fax data has been transmitted by the fax machine; transmitting to the fax machine a second confirmation signal; receiving a disconnect signal; receiving an "on-hook" signal; transmitting a dial string message including the temporarily stored dialed digits in an origination message to a wireless transceiver requesting Fax Class 2.0; transmitting an "AT+FDT" signal to the wireless transceiver; receiving a signal indicative of a line connection; transmitting the stored document image; transmitting a return to command signal (RTC); and transmitting an EOP signal wherein the wireless transceiver terminates its wireless communication link.
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2. An interface circuit for receiving and transmitting signals, comprising:
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a first port for communicating analog voice and digital data signals; a second port for communicating digital data signals; a third port for communicating analog voice signals; a data store having two storage areas, wherein a first storage area is for storing document images and a second storage area is for storing protocols for communication with a wireless transceiver; and at least two processors, wherein a first processor, connected to said first port and said data store, includes a storage area to store protocol for communicating said digital data signals over said first port; a second processor, connected to said second port, said third port, said first processor and said data store, is for communicating with a wireless transceiver via said second port and said third port. - View Dependent Claims (3, 4, 5, 6, 7, 8, 9)
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Specification